acotyledon

[ey-kot-l-eed-n, ey-kot-]

noun

a plant without cotyledons, therefore one belonging to a group lower than the seed plants.

Origin of acotyledon

First recorded in 1810–20; a-⁶ + cotyledon

Related formsa·cot·y·le·don·ous

[ey-kot-l-eed-n-uh s, ey-kot-] /ˈeɪˌkɒt lˈid n əs, eɪˌkɒt-/, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for acotyledon

acotyledon

noun

any plant, such as a fern or moss, that does not possess cotyledons

Derived Formsacotyledonous, adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012